Respiratory Indices Calculator

Oxygenation Index (OI)

Ventilation Index (VI)

Arterial Alveolar Ratio (aA Ratio)

Alveolar Arterial Oxygen Difference (AaDO2)
Reviewed by Carl Kuschel
September
2005
Clinical Guidelines Back Newborn Services Home Page

Respiratory indices have two main uses:

 
Blood gas units:

  • All calculations are performed using mmHg.
    If you choose kPa, the values will be converted to mmHg

% inspired oxygen

%

 

PaO2

   
PaCO2

     
Ventilation mode